public IMemberCompletionContext ProvideMemberCompletionContext(SourceLocation sourceLocation)
{
if (_scope.DataContext == null || _scope.Parameters == null)
{
return(new NullMemberCompletionContext(sourceLocation));
}
_errorReporter.Reset();
Token token = _completionParser.GetTokenBeforeSourcePos(sourceLocation);
Identifier remainingPart;
if (token.Id != TokenId.Identifier)
{
remainingPart = null;
}
else
{
remainingPart = Identifier.InternalFromSource(token.Text);
SourceLocation oneBefore = token.Range.StartLocation;
oneBefore--;
token = _completionParser.GetTokenBeforeSourcePos(oneBefore);
}
if (token.Id == TokenId.ON)
{
NamedTableReference[] joinedTables = _completionParser.GetTableReferencesOfJoin(sourceLocation);
DeclareTableRefs(joinedTables);
return(new TableRelationMemberContext(sourceLocation, remainingPart, _scope, _resolver.CurrentScope));
}
else if (token.Id == TokenId.JOIN)
{
NamedTableReference[] joinedTables = _completionParser.GetTableReferencesOfJoin(sourceLocation);
DeclareTableRefs(joinedTables);
return(new JoinTableMemberContext(sourceLocation, remainingPart, _scope, _resolver.CurrentScope));
}
else
{
ExpressionNode expressionBeforeDot = _completionParser.ParseExpressionBeforeDot(sourceLocation, out remainingPart);
ThrowErrors();
DeclareTableRefs(sourceLocation);
if (expressionBeforeDot == null)
{
return(new GlobalScopeMemberContext(sourceLocation, remainingPart, _scope, _resolver.CurrentScope));
}
else
{
NameExpression expressionAsName = expressionBeforeDot as NameExpression;
if (expressionAsName != null)
{
// Try to resolve a table name.
foreach (NamedTableReference namedTableReference in _completionParser.GetTableReferencesOfQuery(sourceLocation))
{
if (expressionAsName.Name.Matches(namedTableReference.CorrelationName))
{
TableBinding[] tables = _scope.DataContext.Tables.Find(namedTableReference.TableName);
if (tables != null && tables.Length == 1)
{
TableBinding tableBinding = tables[0];
return(new TableContext(sourceLocation, remainingPart, _scope, tableBinding, namedTableReference.CorrelationName.Text));
}
break;
}
}
}
expressionBeforeDot = ResolveExpression(expressionBeforeDot);
if (expressionBeforeDot != null && expressionBeforeDot.ExpressionType != null)
{
return(new MemberContext(sourceLocation, remainingPart, _scope, expressionBeforeDot));
}
}
}
ThrowErrors();
return(new NullMemberCompletionContext(sourceLocation));
}